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چکیده
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In this article, we elaborate further on the 𝛬CDM “tension”, suggested recently by the authors Lusso et al. (Astron Astrophys 628:L4, 2019) and Risaliti and Lusso (Nat Astron 3(3):272, 2019). We combine Supernovae type Ia (SNIa) with quasars (QSO) and Gamma Ray Bursts (GRB) data in order to reconstruct in a model independent way the Hubble relation to as high redshifts as possible. Specifically, in the case of either SNIa or SNIa/QSO data we find that the current values of the cosmokinetic parameters extracted from the Gaussian process are consistent with those of 𝛬CDM. Including GRBs in the analysis we find a tension, which lies between 2𝜎 and 3𝜎 levels respectively. Finally, we find that at high redshifts (𝑧>1) the corresponding cosmokinetic parameters significantly deviate from those of 𝛬CDM, hence the possibility of new Physics is not precluded by the present analysis.
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